Trace file version 7 has more flexible design, which allows to write only
CPUs with trace data in the file. If a CPU has no recorded trace data,
do not put it in the trace file version 7.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
lib/trace-cmd/trace-output.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index 83c3b9e7..87bbcf39 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -2335,8 +2335,10 @@ int tracecmd_write_cpu_data(struct tracecmd_output *handle,
if (i < cpus)
ret = -1;
- else
+ else if (size || handle->file_version < 7) /* do not write empty trace buffer in v7 files*/
ret = out_write_cpu_data(handle, cpus, data, buff_name);
+ else
+ ret = 0;
for (i = 0; i < cpus; i++) {
if (data[i].fd >= 0)
--
2.31.1
|